SaaS Paid Acquisition Budget (using CAC) — Olivia Sabotnicu – PPC Freelancer & Paid Media Consultant for SaaS Companies

Free Tool · SaaS Paid Acquisition Budget Reality Check

You know your target CAC and your lead goal. Is your budget enough to hit both?

This calculator is for SaaS founders and marketers who already have a target — a number of leads, a target CAC, or a target LTV:CAC ratio — and need to know whether the budget behind that target is financially realistic. Enter your numbers, pick the CPL/CPQL or LTV:CAC method, and see the minimum spend required.

Average revenue per user (ARPU / month)

Average customer lifetime (months)

Target LTV:CAC ratio

3:1 is the standard health line for SaaS. Pick a higher ratio if you want more efficiency headroom, lower if you're prioritising growth speed.

Target new customers / month

Testing buffer (%)

Your current monthly budget (optional — see how it compares)

Your minimum viable budget

Minimum viable budget

— /mo

Recommended (with buffer)

— /mo

These numbers tell you what's required. They don't tell you how to structure the campaigns to hit them — that's the part that actually needs a strategist.

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⚠ Modelling based on the CPL/CPQL and LTV:CAC frameworks outlined in "How to Set Your SaaS Paid Acquisition Budget." These are planning estimates, not guarantees — validate against your own conversion data, sales cycle, and churn before committing spend.